<!DOCTYPE html>
<html>

<head lang="en">
    <meta charset="UTF-8">
    <title>Custom Protocol Detection</title>
</head>

<body>
    <h1>Click one of these labels:</h1>

    <div href="blahblah:randomstuff">Non-exist protocol
    </div>
    <div href="mailto:johndoe@somewhere.com">Send email
    </div>
    <script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
    <script src="protocolcheck.js"></script>
    <script src="example.js"></script>
</body>

</html>